Rendering Lecture 01 - Light

This lecture is part of the computer graphics rendering course at TU Wien. It explains computations related to light in the context of physically based rendering.
The course website and slides: www.cg.tuwien....
In slides 44ff I'm talking about differentials. The next time I give the lecture I'll explain what they do, in the meanwhile you can look at 3blue1brown: • The paradox of the der...

[@ragnarokgzlr8522]

At page 41: Watt is not Js, but J/s

[@willhdq]

Sir, at [1:44] a = 1, c is not known, the equation should be written c = a/cos(θ), c = 1/cos(θ) = 1/cos(60º*pi/180) = 1/0.5 = 2

[@cgtuwien]

If I'm not messing something up again, then both equations (your and mine) are correct, only they compute something different. your equation fits to the figure and computes the area, to which a certain beam of light is distributed. however, what we need in rendering is the information about how much light is arriving from a certain direction (the inverse of that). in that case it's 50%. I agree that the figure is bad (thanks for pointing that out), and i'll try to improve it for the next time (but now we give the lecture only in person).

[@chaitanyakumar3809]

25:22 you mutilated the cat wtf :(

[@Antagon666]

Sin and cos should be pronounced as sine and cosine. Sinuses are the nostril airways.

[@ShotgunLlama]

Good lord man, speak up

[@fruitygranulizer540]

i can hear him pretty clearly